163090925 has 18 divisors (see below), whose sum is σ = 209473758. Its totient is φ = 125957440.

The previous prime is 163090909. The next prime is 163090937. The reversal of 163090925 is 529090361.

It can be written as a sum of positive squares in 9 ways, for example, as 17623204 + 145467721 = 4198^2 + 12061^2 .

It is not a de Polignac number, because 163090925 - 2⁴ = 163090909 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17147 + ... + 24903.

It is an arithmetic number, because the mean of its divisors is an integer number (11637431).

Almost surely, 2^163090925 is an apocalyptic number.

It is an amenable number.

163090925 is a deficient number, since it is larger than the sum of its proper divisors (46382833).

163090925 is an equidigital number, since it uses as much as digits as its factorization.

163090925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7825 (or 7791 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 163090925 is about 12770.7057361761. The cubic root of 163090925 is about 546.3571093859.

The spelling of 163090925 in words is "one hundred sixty-three million, ninety thousand, nine hundred twenty-five".